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Old 08-17-2009, 07:27 PM
restapukin restapukin is offline
Motorized Bicycle Elite Member
Join Date: Jul 2009
Location: australia
Posts: 112
Default Re: Art of the Ninja!

i should have said that it's the carbon penetration that is important - the ideal carbon content for tool steel is 4% - that's what you aim for - a good deep layer of carbon steel; pure 'mild' steel is not heat-treatable - 4% carbon steel is very versatile in the way it can be hardened to taste with relative simplicity in the average workshop or kitchen even.

stainless and alloy steels need all kinds of kilns and thermometers and oil baths to heat-treat
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